This is a limitation on all phones with the physical size of the photo sensor,ISO, and physical limitations of the lenses. It's not as simple as a backlight mode. The camera will automatically adjust for how much light is available. A backlight mode will just lower the shutter speed and try to up the ISO more, resulting in a grainy and/or blurry photo.

Nokia has addressed this to an extent by making their sensors larger (and able to handle high ISO), and physically larger and better lenses.

Cameras in phones are all racing to add more pixels to their cameras but no matter how many are added, there is a problem as none I've seen use backlighting adjustments. The iPhone 5 takes nice photos in bright light but when I stand before something brightly lit, I appear as a silhouette. Using the built-in flash doesn't help either. Why haven't they addressed this issue? A simple backlight switch would help.